Schaeffler, an automotive supplier that specializes in ball bearings, and FordFordUnited Kingdom, 1909 > present33 models
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have created a technological concept called the Fiesta e-Wheel DriveFord Fiesta eWheelDriveUnited States of America, 2013 > present that uses hub-mounted electric motors in each rear wheel. It will be on display at the Auto, Motor und Sport Congress in Stuttgart.

The electric motor, electronics, controller, brakes and liquid cooling system are installed in the wheel hub, and it requires wheels 16in or larger to fit. The batteries are stored under the hood where the batteries would usually be. Each unit produces a peak of 54hp or a constant 44hp and a total of 516lb-ft of torque. Each hub weighs 53kg (117lb), but Schaeffler estimates that a conventional wheel bearing and brake would weigh 45kg (99lb).

"The wheel hub drive makes previously unheard-of space savings possible. In these new vehicle concepts, all components that are relevant for propulsion, braking, and driving safety are housed inside the wheel. The vehicle platform therefore provides maximum space for passengers, luggage, and for the battery, electronics, and communication systems. And vehicle manufacturers can use this as a basis for a range of different body designs," said Professor Peter Gutzmer, member of Schaeffler's executive board. 

Ford took the test car to Scandinavia to test how the system would work in cold climates. In theory automakers could use the hubs turn the wheels 90 degrees to parallel park horizontally.

Schaeffler previously experimented with an earlier version of the technology on an Opel CorsaOpel Corsa Gen.4 [D]Germany, 2006 > present222 versions
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. The latest version has 33% more power, 75% more torque and weighs 6kg (13lb) less.

Source: Auto Express